Data Sheet

Enhanced Multi-touch Capacitive Touch Screen Controller

AP389X

Apr. 2013

Rev. 1. 0

BCD Semiconductor Manufacturing Limited

7

Functional Block Diagram

Figure 4. Main AFE I/O Pin Assignment and Whole Chip’s Functional Block Diagram

Mode Control

Register Table

SDA

Analog signals S[23:1]

SCL

RSTN

D[38:1]

MUX

64K Flash

12K SRAM

I2C M/S

SFR

MCU

4~48M

OSC

CLK

MDU

INT

TESTEN

POR18

POR33

LVD

Stage 23

/

Stage 9

Stage 8

Stage 7

Stage 6

Stage 5

Stage 4

Stage 3

Stage 2

Stage 1

Stage 0

DAI

S/H

SAR

8-bit

ADC

VDD18

VDD33

P3.6

S11

S10

S9

S8

S7

S6

S1

S3

S4

S5

S2

P1.7

SAR

8-bit

ADC

VSS

D23

D24

D25

D29

D28

D27

D26

D22

D30

D31

D32

D33

D34

D35

D36

D37

D38

FIFO

896 12-bit SRAM

(Baseline)

896 8-bit SRAM

(CMOD_Buffer)

896 12-bit SRAM

(SCAN_Buffer)

+

-